Dynamic compaction of a thick soil-stone fill: Dynamic response and strengthening mechanisms

This paper presents a numerical study of the dynamic compaction (DC) process, based on the finite element method, with the main attention on the role of water content on the soil response....

Dynamic Compaction of Clays: Numerical Study Based on the Mechanics of Unsaturated Soils

This paper investigates the effects of different preparation methods (dry tamping, moist tamping, dry pluviation and wet pluviation) on inherent fabric anisotropy of reconstituted sand samples in t...

https://www.tandfonline.com/doi/pdf/10.1080/23311916.2018.1533363

Effects of preparation methods on inherent fabric anisotropy and packing density of reconstituted sand

Microstructures within and outside the smear zones for soft clay improvement using PVD only, Vacuum-PVD, Thermo-PVD and Thermo-Vacuum-PVD

With exponential increases in digital camera resolution, the last 15 years have witnessed major advances in the use of image analysis in geotechnical engineering. This paper highlights the history of photography and image analysis. It includes a d atabase of 100 recent references describing the use of image analysis in four geotechnical areas: site characterization; earth mass characterization; particle characterization; motion and deformation. Also described are the authors' development of image analysis systems for particle size and shape characterization. They include the Translucent Segregation Table (TST), Sedimaging, the Vision Cone Penetrometer (VisCPT), Stereophotography and In-situ Particle Tracking. Future research will lead to the estimation of intrinsic soil properties based on detailed assessment of particle size and shape distributions from images of both non- contacting and three-dimensional assemblies of particles.

Innovations in Optical Geocharacterization

This paper presents the findings of a digital image analysis based study of clay fills, compacted with dynamic compaction for a building foundation in northeast Beijing, People’s Republic of China. Three levels of compaction energy were used at three compaction pits, respectively. Ground settlements and soil density increased with the number of dynamic impact blows. Microstructures of dry clay fill samples from the pits were examined with a scanning electronic microscope (SEM). Their microstructural parameters were further measured and analyzed quantitatively using digital image analysis. The clay SEM images are automatically converted into ternary images representing particles, pores, and contact zones for effective and efficient calculation of the clay microstructural parameters. The effect of dynamic compaction on the clay microstructural properties at different blow numbers and compaction energy levels is examined. Analysis revealed that the changes of the soil microstructural properties have a good c...

Digital Image Analysis of Dynamic Compaction Effects on Clay Fills

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Digital Image Analysis of Dynamic Compaction Effects on Clay Fills